[PATCH] Handle instruction cache maintenance fault properly
in [Kernel]
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From: Kirill A. Shutemov on 10 May 2010 09:10 Between "clean D line..." and "invalidate I line" operations in v7_coherent_user_range(), the memory page may get swapped out. And the fault on "invalidate I line" could not be properly handled causing the oops. The patch adds the missing handling for "instruction cache maintenance fault". Let's handle it as translation fault. Signed-off-by: Siarhei Siamashka <siarhei.siamashka(a)nokia.com> Signed-off-by: Kirill A. Shutemov <kirill(a)shutemov.name> --- arch/arm/mm/fault.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c index 9d40c34..8924617 100644 --- a/arch/arm/mm/fault.c +++ b/arch/arm/mm/fault.c @@ -463,7 +463,7 @@ static struct fsr_info { { do_bad, SIGILL, BUS_ADRALN, "alignment exception" }, { do_bad, SIGKILL, 0, "terminal exception" }, { do_bad, SIGILL, BUS_ADRALN, "alignment exception" }, - { do_bad, SIGBUS, 0, "external abort on linefetch" }, + { do_translation_fault, SIGSEGV, SEGV_MAPPER, "I-cache maintenance fault" }, { do_translation_fault, SIGSEGV, SEGV_MAPERR, "section translation fault" }, { do_bad, SIGBUS, 0, "external abort on linefetch" }, { do_page_fault, SIGSEGV, SEGV_MAPERR, "page translation fault" }, -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |